CVE-2024-49883 is a use-after-free vulnerability in the ext4 filesystem implementation of the Linux kernel, specifically in the ext4_ext_insert_extent() function. The flaw occurs when a path pointer is reallocated in ext4_ext_create_new_leaf() but the stale pointer is still used afterward, leading to a use-after-free condition. This can cause memory corruption and potentially allow an attacker with local privileges to escalate their privileges or cause denial of service. The vulnerability has a CVSS score of 7.8, indicating high severity.